Can you help me in write the perimeter of the triangle in simplest

Step-by-step explanation:

Perimeter of triangle = sum of all sides

= 3x + 1 + x + 8 + 2x -  6

= 3x + x + 2x + 1 +  8 - 6  {Combine like terms}

= 6x + 3

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36